SQL答案doc全部答案用文档写的

2-01： 1.select * from city 2.select distinct OrderDate from orders 3.select * from suppliers where SuppCode='HHT' 4.select * from suppliers where SuppCode!='HHT' 5.select Descriptions,UnitPrice from products where UnitPrice between 0 and 20 6.select DistriNum,BossName,Company from distributors wher